What is the CVSS score of CVE-2026-43773?

CVE-2026-43773 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Is there a patch available for CVE-2026-43773?

Yes, a patch is available for CVE-2026-43773. Update the affected software to the latest version immediately.

Apple CVE-2026-43773

EUVD-2026-49535 CRITICAL

Out-of-bounds Read (CWE-125)

2026-07-27 apple

GHSA-97g5-frq9-2c8c

Buffer Overflow Information Disclosure Apple

9.8

CVSS 3.1 · Vendor: apple

Severity by source

Vendor (apple) PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from Vendor (apple) · only source for this CVE.

CVSS VectorVendor: apple

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Jul 28, 2026 - 15:25 vuln.today

CVSS changed

Jul 28, 2026 - 15:22 NVD

9.8 (CRITICAL)

Patch available

Jul 27, 2026 - 21:17 EUVD

CVE Published

Jul 27, 2026 - 20:13 cve.org

UNKNOWN (no severity yet)

CVE Published

Jul 27, 2026 - 20:13 cve.org

CRITICAL 9.8

DescriptionCVE.org

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Mounting a maliciously crafted disk image may cause unexpected system termination or corrupt kernel memory.

AnalysisAI

Mounting a maliciously crafted disk image on macOS may cause unexpected system termination or corrupt kernel memory. Affected versions include macOS Sequoia prior to 15.7.8, macOS Sonoma prior to 14.8.8, and macOS Tahoe prior to 26.6. The vulnerability is an out-of-bounds read in the kernel's disk image handling, exploitable by a locally authenticated user with no privileges beyond the ability to mount a disk image.